Wouldn’t the Translate plugin handle that since the About description is actually treated as a topic.
This is not quite what you need for a multilingual forum. The category page will display the description without translation. At the same time, additional calls through the API through Google Translate require more costs.
This is currently being worked on by @merefield.
It’s a good news. Will the plugin be able to translate subcategories with multiple levels of nesting?
I have another question. Will the category URLs be different for each language or the same?